First of all, I want to confirm your point about the fact that not all $180B+ of USDT that Tether has issued would be needed for the reserve. Now, that's out of the way, I don't think Circle compliance should be used as benchmark for Tether. If anything, what happened to Circle in 2023 already showed that the rule itself is flawed. USDC depegged to $0.87 because $3.3B of its reserves was stuck in SVB. That's the same kind of bank exposure the 60% rule would force on issuers, with deposit insurance covering only €100k per bank
Firstly, thanks for confirming it. So it's based on the numbers how much money in the EU instead of using full FDV. That aside, i think Circle compliance should be used as a benchmark because they operated in the same business like what tether did. SVB case is not even relevant because it's not even linking up to the MICA license the granted by French entity to them.
Tether disagreeing with that rule might not mean they are trying to hide stuff. They have gotten a thorough audit recently so if they had anything to hide, they wouldn't have done that audit. Moreover, most central banks like ECB and EU central banks don't like that rule too because it causes a "contagion risk".
If they didn't try to hide the shady stuff, they would open to apply for the MICA license. We have several stable coin issuer such as Circle, Paxos, and etc already got their Mica license. Why can't tether who claimed themselves to be the biggest stable issuer do that while we know how big EU market for them?
The most important thing, tether never let others to know the report about their reserve even after they said their reserve fully audited and verified by KPMG.